// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.from
description: >
    `this` value of mapping function with custom `this` argument (traversed via iterator)
info: |
    [...]
    2. If mapfn is undefined, let mapping be false.
    3. else
       a. If IsCallable(mapfn) is false, throw a TypeError exception.
       b. If thisArg was supplied, let T be thisArg; else let T be undefined.
       c. Let mapping be true
    [...]
    6. If usingIterator is not undefined, then
       [...]
       g. Repeat
          [...]
          vii. If mapping is true, then
               1. Let mappedValue be Call(mapfn, T, «nextValue, k»).
features: [Symbol.iterator]
---*/

function Test() {
    var thisVals = [];
    var nextResult = {
      done: false,
      value: {}
    };
    var nextNextResult = {
      done: false,
      value: {}
    };
    var mapFn = function() {
      thisVals.push(this);
    };
    var items = {};
    var thisVal = {};

    items[Symbol.iterator] = function() {
      return {
        next: function() {
          var result = nextResult;
          nextResult = nextNextResult;
          nextNextResult = {
            done: true
          };

          return result;
        }
      };
    };

    Array.from(items, mapFn, thisVal);

    assert.sameValue(thisVals.length, 2, 'The value of thisVals.length is expected to be 2');
    assert.sameValue(thisVals[0], thisVal, 'The value of thisVals[0] is expected to equal the value of thisVal');
    assert.sameValue(thisVals[1], thisVal, 'The value of thisVals[1] is expected to equal the value of thisVal');
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
